I prefer looking at the paper copies, made in about 1910, of the parish registers, which include Bride, but you have to pay a small charge for each volume produced. In the Museum you view those same copies on microfilm, free of charge, and it is open on Saturday. Wills of the period you are interested in are in the Manx Museum, again, viewed on microfilm.

You won't be able to do all that you want to in the time available, and there are others who post on this bulletin board who can tell you better than I can how to get hold of copies of records without having to travel to the Isle of Man, delightful though that is.